Best lq9 cylinder head

Reply Subscribe

Thread Tools

Search this Thread

Jan 27, 2014 | 04:25 AM

Daniel Nicastri

Thread Starter

Registered User

Joined: Jan 2014

Posts: 16

Likes: 0

Best lq9 cylinder head

What's the best bang for buck cylinder head for a lq9 408 rectangle port intake for single 80mm turbo

Jan 27, 2014 | 05:37 AM

99WS6_

On The Tree

iTrader: (1)

Joined: Oct 2012

Posts: 119

Likes: 0

From: Houston

Stock some 317 it gives lower comp and heard it flows well...aftermarket it an be some afr 230cc with 72cc chambers

Jan 27, 2014 | 06:07 AM

HexenLord

TECH Enthusiast

Joined: Mar 2012

Posts: 728

Likes: 3

LS3 heads. Flow close to what aftermarket cathedral port heads do, and are $1000 new with valves/springs installed from Scoggin Dickey.

Jan 27, 2014 | 08:41 AM

Preston99WS6

TECH Apprentice

iTrader: (7)

Joined: Aug 2005

Posts: 384

Likes: 1

From: Rockingham, NC

For boost I would roll with LSA's because there decks are thicker and made out of stronger aluminum they cost a little more but IMO its worth it to not have to worry about lifting the heads. LS3/L92's seem to be hit or miss when it comes to boost, some people get away with them and dont lift the heads others have problems. From what I gather all it takes is a little bit of detonation and you will be changing head gaskets at the minimum with LS3/L92's, on the other hand LSA's take a little more abuse which makes them more reliable in a FI application.

You cant beat the flow out of the box of the rectangle ports though as far as bang for your buck.